Venters, Tonia M., Pavlidou, Vasiliki, Reyes, Luis C.
High-energy photons from cosmological emitters suffer attenuation due to pair production interactions with the extragalactic background light (EBL). The collective emission of any high-energy...
Venters, Tonia M., Pavlidou, Vasiliki, Reyes, Luis C.
High-energy photons from cosmological emitters suffer attenuation due to pair production interactions with the extragalactic background light (EBL). The collective emission of any high-energy...
Imprint of galaxy clustering in the cosmic gamma-ray background (2009)
Ando, Shin'ichiro, Pavlidou, Vasiliki
Star-forming galaxies are predicted to contribute considerably to the cosmic gamma-ray background (CGB) as they are confirmed gamma-ray emitters and are the most numerous population of gamma-ray...
Robust Identification of Isotropic Diffuse Gamma Rays from Galactic Dark Matter (2009)
Siegal-Gaskins, Jennifer M., Pavlidou, Vasiliki
Dark matter annihilation in Galactic substructure will produce diffuse gamma-ray emission of remarkably constant intensity across the sky, making it difficult to disentangle this Galactic dark matter...
Robust identification of isotropic diffuse gamma rays from Galactic dark matter (2009)
Siegal-Gaskins, Jennifer M., Pavlidou, Vasiliki
Dark matter annihilation in Galactic substructure will produce diffuse gamma-ray emission of remarkably constant intensity across the sky, making it difficult to disentangle this Galactic dark matter...
The Spectral Shape of the Gamma-ray Background from Blazars (2007)
Pavlidou, Vasiliki, Venters, Tonia M.
The spectral shape of the unresolved emission from different classes of gamma-ray emitters can be used to disentangle the contributions from these populations to the extragalactic gamma-ray...
The Spectral Index Distribution of EGRET Blazars: Prospects for GLAST (2007)
Venters, Tonia M., Pavlidou, Vasiliki
The intrinsic distribution of spectral indices in GeV energies of gamma-ray--loud blazars is a critical input in determining the spectral shape of the unresolved blazar contribution to the diffuse...
Pavlidou, Vasiliki, Fields, Brian D.
We present an analytical description of the energetics of the population of cosmic accretion shocks, for a concordance cosmology. We calculate how the shock-processed accretion power and mass current...
We present a new analytic tool for the study of cosmic structure formation, a double distribution of the number density of dark matter halos with respect to both halo mass and local over- (or under-)...
Double Distribution of Dark Matter Halos with respect to Mass and Local Overdensity (2004)
Pavlidou, Vasiliki, Fields, Brian D.
We present a double distribution function of dark matter halos, with respect to both object mass and local over- (or under-) density. This analytical tool provides a statistical treatment of the...
The Guaranteed Gamma-Ray Background (2002)
Pavlidou, Vasiliki, Fields, Brian D.
The diffuse extragalactic gamma-ray background (EGRB) above 100 MeV encodes unique information about high-energy processes in the universe. Numerous sources for the EGRB have been proposed, but the...
Cyburt, Richard H., Fields, Brian D., Pavlidou, Vasiliki, Wandelt, Benjamin D.
Self-interacting dark matter (SIDM) was introduced by Spergel & Steinhardt to address possible discrepancies between collisionless dark matter simulations and observations on scales of less than 1...
Diffuse Gamma-Rays from Local Group Galaxies (2001)
Pavlidou, Vasiliki, Fields, Brian D.
Diffuse gamma-ray radiation in galaxies is produced by cosmic ray interactions with the interstellar medium. With the completion of EGRET observations, the only extragalactic object from which there...
Radiative Falloff in Neutron Star Spacetimes (2000)
Pavlidou, Vasiliki, Tassis, Konstantinos, Baumgarte, Thomas W., Shapiro, Stuart L.
We systematically study late-time tails of scalar waves propagating in neutron star spacetimes. We consider uniform density neutron stars, for which the background spacetime is analytic and the...
Greek Goat Encephalitis Virus Strain Isolated from Ixodes ricinus, Greece
Papa, Anna, Pavlidou, Vasiliki, Antoniadis, Antonis
A strain of Greek goat encephaltitis virus was isolated from engorged Ixodes ricinus ticks that had fed on goats in northern Greece. The strain was almost identical to the prototype strain isolated...